CVE-2026-45998

HIGH EPSS 2.9%
Published May 27, 20261mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥6.2  –  <6.6.140
linuxlinux_kernel*≥6.7  –  <6.12.86
linuxlinux_kernel*≥6.13  –  <6.18.27
linuxlinux_kernel*≥6.19  –  <7.0.4

References 5

  • git.kernel.org https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
    Patch